package main

import (
	"fmt"
	"time"
)

func count(name string) {
	for i := 0; i < 10; i++ {
		fmt.Printf("%s: %d\n", name, i)
		time.Sleep(100 * time.Millisecond)
	}
}

func main() {
	go count("Allen")
	count("Luffy")
}
